Then why bother locking it out in the first place? I never found lockout to be particularly effective either, especially after platform damping came around, but lots of converted roadies lately seem pretty excited about it.

To the OP, if you find the ride of a stiff road bike on asphalt uncomfortable due to jarring and impact, perhaps mountain biking is not the right sport for you. It depends on the trail of course, but fat tires only go so far to mitigate terrain feedback. That's why many folks ride full suspension bikes.